中国岩溶Issue(3)：228-233,6.DOI:10.11932/karst20150304
南宁市区地下水水化学特征及形成机制
Hydrochemical characteristics and formation mechanism of groundwater in Nanning City
摘要
Abstract
For further studying the hydro-chemical characteristics of groundwater,understanding groundwa-ter quality,and revealing the hydrochemical processes that control the evolution of the groundwater quality, we collected 22 sets of pore water and 7 sets of karst water to measue pH,cation and anion,total dissolved solids (TDS)and total hardness,and studied hydrochemical characteristics and formation mechanism.The results show that the average pH of pore water and karst water are both below 7,and the values of TDS and total hardness are almost the same.The most anions in pore water and karst water are both HCO -3 ,with values 68.08 mg/L and 106.68 mg/L,respectively.The cations include Ca2 + ≥Na+ >Mg2 + >K+ ,the aver-age values of Ca2 + are 24.04 mg/L and 31.34 mg/L,respectively.The groundwater hydrochemical composi-tions are formed by the weathered-leached effects and mixing action,groundwater hydro-chemistry type is HCO 3 - Ca type water.The geological environment is a major cause for the generally low pH value of groundwater.The impact of human activity on groundwater is increasingly important.The pH value and change of hydrochemical type are closely related to economic development,population increase,growth of industrial and mining enterprises and other human activity.关键词
地下水/水化学特征/成因分析/南宁市区Key words
groundwater/hydro-chemical characteristics/cause of formation/Nanning City分类
天文与地球科学引用本文复制引用
苗迎,孔祥胜,宋朝静..南宁市区地下水水化学特征及形成机制[J].中国岩溶,2015,(3):228-233,6.基金项目
中国地质调查局地质调查项目“西南主要城市地下水污染调查评价”(1212011121166) （1212011121166）
广西重点实验室建设项目(14-045-06)共同资助 （14-045-06）
